YASKAWA F7 Programming Manual page 138

Torque limit is activated in both the speed and torque control when operating in open loop vector or flux vector control methods
(A1-02 = 2 or 3). If the multi-function analog input is programmed for "10: Forward Torque Limit", "11: Reverse Torque
Limit", "12: Regen Torque Limit", or "15: FWD/REV Torque Limit", the Drive uses the lower value of either L7-0x or analog
input torque limit.
The following block diagram shows the relationship between torque limit using parameter settings and torque limit using multi-
function analog inputs.
Multi-function Analog Input
M ul t-f uncti on A nal og I nput
Term i nal
Terminal
10:Fwd Torque Limit
10: Fw d Torque Li m i t
A2 or A3
A 2 or A 3
11:Rev Torque Limit
11: R ev Torque Li m i t
A
12:Regen Torque Limit
12: R egen Torque Li m i t
D
15:Torque Limit
15: Torque Li m i t
L7-01 Forward Torque Limit
L7-01 Forw ard Torque Li m i t
L7-02 Reverse Torque Limit L7-02 R everse Torque Li m i t
Constants
C onstants
L7-03 Forward Regen Torque Limit
L7-03 Forw ard R egen T orque Li m i t
L7-04 Reverse Regen Torque Limit
L7-04 R everse R egen Torque Li m i t
REV Run Regen
L7-04
REV Motor Rotation
REV Run Motor
L7-02
Fig. 94 Torque Limit - 4 Quadrant Operation
Positive
P osi ti ve
torque
torque
M i n
M in
M in M i n
reverse dri ve,
reverse drive,
reverse torque
reverse torque
Fig. 95 Torque Limit Block Diagram
Positive Torque Reference
Quadrant 1
Quadrant 2
Quadrant 3 Quadrant 4
Negative Torque Reference
forw ard dri ve,
forward drive,
forward torque
forw ard torque
rg
f
rg
reverse posi ti ve regenerati ve torque
reverse positive regenerative torque
M i n
M in
r
fg
fg
forward negative regenerative torque
forw ard negati ve regenerati ve torque
M i n
M in
M in:Minimum value priority circuit
M i n
M in
M in M i n
175% of Drive rated current
175% of D ri ve rated current
Programming 130
FWD Run Motor
L7-01
FWD Motor Rotation
FWD Run Regen
L7-03
M i n: M i ni m um val ue pri ori ty ci rcui t
64 ms 64 m s
M i n SFS
M in SFS
M in M i n SFS
SFS
M in M i n M in M i n SFS
SFS
M i n M in M i n SFS SFS
M in
Forward Torque Limit Forw ard T orque Li m i t
Reverse Torque Limit
R everse Torque Li m i t
Forward Regen Torque Limit
Forw ard R egen Torque Li m i t
Reverse Regen Torque Limit R everse R egen Torque Li m i t